Observations and interpretations of every day life, that helped me understand some things better!
The Chunkplan was a plan system, that I had designed to get the maximum productivity out of myself. Though I have to note, that I had never a problem with that in an external context (school or work), only in terms of my private life and goals.
Whenever I was setting dates for things, making to-do lists outside of work, it became dragging or obsolete real quick. But this one I actually managed to integrate so well into my life, that is helped me boost my productivity in private terms over years. To keep it short, it was the perfect mix of setting fixed things, but keeping things still as flexible and chill as possible, boosting productivity as much as it can be boosted, with the lowest possible stress.
If this is a category you need, I won't keep you here by writing too much. Long story short, I fought it just by myself for a long time, noted most of my experiences and observations down and these are a few rather “special” tips, other than normal recommendations you can find online! Good luck!